InterviewSolution
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InterviewSolution
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`E^@` values for the half cell reactions are given below : `Cu^(2+) + e^(-) to Cu^(+) , E^@`=0.15 V `Cu^(2+) + 2e^(-) to Cu, E^@`=0.34 V What will be the `E^@` of the half-cell : `Cu^(+) + e^(-) to Cu` ?A. `+0.49 V`B. `+0.19 V`C. `+0.53V`D. `+0.30V` |
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Answer» Correct Answer - C `{:(Cu^(2+)+e^(-) to Cu^(+) ,,E_(1)^(@)=0.15 V","DeltaG_1^@","n_1=1),(Cu^(2+)+2e^(-) to Cu , ,E_2^(@)=0.34 V","DeltaG_2^(@)","n_2=2),(Cu^(+)+e^(-) to Cu,,E_3^(@)=?"," DeltaG_3^(@)","n_3=1),(DeltaG_3^@ = DeltaG_2^@-DeltaG_1^@ rArr ,-n_3FE_3^@=-n_2FE_2^@+n_1FE_1^@):}` `-E_3^@` = -2 x 0.34 + 1 x 0.15 `E_3^@`= 0.68 - 0.15 = +0.53 V |
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